JPS5818208B2 - Cement Seihin no Seizouhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing glass fiber reinforced cement products.

Glass fiber-reinforced cement products have higher strength than conventional cement products, and are also thinner and lighter, and are usually manufactured using a spraying method.

Depending on the shape of these products, they are often reinforced by providing a rising part at the end, or reinforcing each by inserting a core material into the rising part to form a product with a lip structure.

However, this spraying operation at the rising part causes a lot of scattering of raw materials, such as glass fibers, cement slurry, etc., and expensive raw materials are scattered, causing problems in terms of economy and workability.

The present invention aims to improve the drawbacks that occur when producing cement products by such spraying operations, and to provide a method for producing glass fiber-reinforced cement products that are homogeneous and have excellent strength.

In manufacturing glass fiber reinforced cement products by the spraying method, the present invention arranges a receiving plate along the upper side of the rising part of the formwork, and prevents the raw materials deposited on the receiving plate by spraying from solidifying. This method of manufacturing a cement product is characterized in that the product is bent along with the receiving plate to form a lip around the product on the formwork.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a part of a formwork for manufacturing the rising part of a product, where 1 is the bottom of the formwork, and 2 is the rising part of the formwork connected to the side of the bottom part 1.

3 is a receiving plate provided along the upper side of the rising portion 2.

The receiving plate 3 is swingably supported on the upright portion 2 by conventional means.

As for the mode of support, for example, the receiving plate 3 may be held on the rising portion 2 by a hinge, or may be held manually during the spraying operation.

As shown in FIG. 2, a raw material consisting of glass fibers and cement slurry is sprayed to a predetermined thickness onto the portion of the formwork having the raised portion thus constructed to form the wall portion 4.

During this spraying operation, a part of the raw material is scattered and forms a deposit 5 on the receiving plate 3.

That is, the raw material that would conventionally be scattered is captured on the receiving plate 3.

Next, a temporary frame 6 that becomes the core material of the lip and maintains its shape.
After arranging the materials as shown in the figure, tilt the receiving plate 3 in the direction of the arrow before the sprayed raw material has solidified, and as shown in FIG. Or wrap a part of it.

Thereafter, the receiving plate 3 is removed, and the temporary frame 6 is further sufficiently wrapped with the deposit 5 and pressed, so that the temporary frame 6, the deposit 5, and each wall portion 4 are brought into close contact with each other.

Next, as shown in FIG. 4, raw materials are sprayed onto each part of the product to a predetermined thickness to give the product its final shape.

The temporary frame 6 to be embedded in the product can be made of an appropriate material such as shaped steel, steel plate, or synthetic resin such as styrofoam, depending on the purpose of use of the product and the required strength. may also be modified as appropriate.

Moreover, when providing a border on the corner portion 7 of the rising portion of the product, the shape of the receiving plate of the core portion may be modified as appropriate.

Note that the present invention is not limited to the above-mentioned embodiments, and, for example, the temporary frame serving as the core material may be placed on the deposit of the receiving plate to determine the shape, or the product may be manufactured without inserting a temporary frame. Of course, it is also applicable to other cases.

As described above, the manufacturing method of the present invention captures the raw materials that would have been dissipated in the conventional spraying operation and utilizes them without wasting them, resulting in improved economic efficiency.

In addition, in order to bend the raw material that is continuously deposited on the receiving plate from the wall of the rising part of the product onto the temporary frame of the core material, the corners of the rising part are formed by continuous glass fibers. Therefore, defects such as faults in the core, decreased strength, and non-uniformity of composition that appear due to conventional splicing are eliminated, and the fuzz of the glass fibers in the core is eliminated, improving the commercial value.

Naturally, work efficiency also improves. As described above, the method for producing glass fiber reinforced cement products according to the present invention is significantly superior to conventional methods in terms of economy, workability, and quality.

[Brief explanation of the drawing]

FIGS. 1 to 4 are explanatory drawings showing one embodiment of the manufacturing method of the present invention in the order of steps. 1...Bottom of the formwork, 2...Rising part of the formwork, 3...-receiving plate, 4...Wall part,
5...Deposit, 6...-Temporary frame, 7...
...The corner of the rising part of the product.

Claims (1)

[Claims] 1. When manufacturing glass fiber reinforced cement products using the spraying method, a receiving plate is placed along the upper side of the rising part of the formwork, and the raw materials deposited on the receiving plate by blowing are prevented from solidifying. A method for manufacturing a cement product, which comprises bending the product together with the receiving plate to form a lip around the product on the formwork.